Restless Earth 0.0 / 5 ? GeographyWeather and climateGCSEAll boards Created by: Ryan..RichardsonCreated on: 17-12-15 21:33 Geosphere The rock of the different layers of the earth eg Lithosphere, Asthenosphere, Core 1 of 12 Magma/Lava Hot molten rock (of any kind). When it is below the Earth's surface it is called magma when it's above is Lava 2 of 12 Convection Current Where a material is heated, rises, cools and sinks in a contious cycle. 3 of 12 Plume The part of the convection current which rises due to being hotter, and therefore less dense, than the surrounding material. 4 of 12 Magnetosphere The region surrounding the Earth where the magnetic field dominates space. 5 of 12 Subduction The sidesways and downwards movement of the edge of a techtonic plate, under another techtonic plate,into the mantel. 6 of 12 Silica A hard, colourless quartz material, which thickens molten rock (eg magma & lava) 7 of 12 Viscosity How thick or stickey something is. 8 of 12 VEI Volcanic Explosive Index. On a scale to (0-8) 0- less powerfull 8 more powerful and more dangerous. 9 of 12 Lahar A destructive mudflow which is made of ash and water (form the weather) and travels down the sides of the volcano. 10 of 12 Pyroclastic Flows A dense, destructive mass of very hot ash which can be up to 200-700*C) lava fragments and gas flow down the side of the volcano. 11 of 12 Topic 1 Restless Earth The Key Definitions 12 of 12
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